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Forum Index : Microcontroller and PC projects : New 4 inch LCD

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Posted: 04:55pm
14 Mar 2024
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Bleep
Guru

I'm hoping that this display will be usable with the ILI9488 driver on Picimite?
4" 480x320 LCD using ILI9488 chip
It claims to use the same chip & is same resolution so in theory it will work, not sure about the touch though?
 
Posted: 08:59pm
14 Mar 2024
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palcal
Guru


I'll find out one day I just bought one.
 
Posted: 09:52pm
14 Mar 2024
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stanleyella
Guru


the link said £3.xx now says  £23.xx
other ad shows it £7.xx
 
Posted: 10:21pm
14 Mar 2024
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Mixtel90
Guru


The link says £45.37 for the touch version here.
Remember that on AE the price is shown without taxes and shipping though. Sometimes you have to spend £8 to get stuff in less than a month too!.
 
Posted: 10:49pm
14 Mar 2024
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stanleyella
Guru


other ad from original link
https://www.aliexpress.com/item/1005006262797500.html?
 
Posted: 12:09am
15 Mar 2024
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lizby
Guru

For me, the link in the first post shows $12.76USD without touch, and $13.89 with--both including shipping. Why would the UK price be so high?
 
Posted: 12:32am
15 Mar 2024
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phil99
Guru


I suspect the price you are seeing is the "First Time Discount" from that seller.
When I clicked that link the price was $AU 12.xx for the touch version but jumped to $AU 21.27 + 10% tax when I logged in. Presumably I have bought from them before.
 
Posted: 01:17am
15 Mar 2024
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bigmik
Guru


Hi Bleep,

AndrewG and I have been using these as our preferred LCD for well over 6 months now. They are exceptionally good.

BTW the price shown for me is $19.54AU

Regards,

Mick.
 
Posted: 02:53am
15 Mar 2024
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palcal
Guru


Mine cost A$23.  Free postage
Edited 2024-03-15 14:23 by palcal
 
Posted: 08:11am
15 Mar 2024
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Pluto
Guru

Ordered one yesterday. From the hint by Bleep on top of this thread. €16:50 incl VAT and postage.
Good to hear that Mick has been satisfied.
 
Posted: 09:17am
15 Mar 2024
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Mixtel90
Guru


LOL!
I was bog-eyed and thick-fingeredlast night....
The Price was (and still is) £4.37 for the touch version here.
 
Posted: 10:19am
15 Mar 2024
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Bleep
Guru

Hi, Aliexpress must almost make up the price on the fly!
Every time I go there my price, without touch is £9.56, or £10.43 with touch, free delivery, but 20%VAT is added at checkout, so £12.48 for a touch version delivered, supposedly 7 day delivry!  Yes I've ordered one to try. :-)
Regards Kevin
Edited 2024-03-15 20:22 by Bleep
 
Posted: 10:29am
15 Mar 2024
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Bleep
Guru

Mick, the big one,
Does this screen still need the resistor diode mod to get it working properly, can someone point me to a definitive version of how to connect up this mod, a simple circuit diagram showing resistor & diode & what pins to connect to will be fine.
Regards Kevin.
 
Posted: 10:36am
15 Mar 2024
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matherp
Guru

Thing to remember about the ili9488.

1. They are slow
2. You need an extra resistor and diode to get reliable reading
3. They are slow
4. They are too big for both a framebuffer and a layer buffer to fit in memory
5. They are slow


Reasons:
The ILI9488 controller has a bug where it doesn't tri-state MISO properly hence 2
The ILI9488 does not support 16-bit RGB565 over SPI so all writes and all reads are 3 bytes per pixel
The ILI9488 needs a much slower clock for reading pixels than any other display
They only support H/W scrolling in portrait mode so use for a console is terrible. It takes about 1 second to scroll a line of text up the screen
They have 2x the pixels of an ILI9341 and need 3 bytes per pixel vs 2 so things like CLS take 3x longer than on an ILI9341

Wiring mod



Edited 2024-03-15 20:45 by matherp
 
Posted: 12:21pm
15 Mar 2024
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Bleep
Guru

Hi Peter,
I realise they are slow, :-( I want to use one as a console on a Picomite USB I like the 340x480 space, but it appears this is the only display of that resolution that can be used as a console, now that the 9481 is disabled, it looks like scrolling is very slow, but page up/down not too bsd, so I'll have to train myself to mainly use that.
Thank you for the photo of the mod, that looks very simple.
Regards Kevin.
 
Posted: 01:58pm
15 Mar 2024
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lizby
Guru

  matherp said  They are slow ... You need an extra resistor and diode to get reliable reading ... They are slow ... They are too big for both a framebuffer and a layer buffer to fit in memory ... They are slow


Is there any more suitable 480x320 SPI LCD which is supported (or could be)?

I'm with bleep--if there's nothing better (of the SPI type), the ILI9488 is satisfactory.
 
Posted: 02:08pm
15 Mar 2024
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stanleyella
Guru


Kevin, don't want to digress but these 7 inch displays I paid £12.50 for. Sold as car reversing monitor. got hdmi, vga and composite video... not avi as advertised- no audio- no speakers. says 5V to 24V supply but need 2A 5V. 12V 1A ok
vga 640x480 and pico is readable and scrolls as vga does. uses little space.
use with a small usb keyboard makes a small system.. no touch screen or sd card slot though. just a suggestion. stan

 
Posted: 03:12pm
15 Mar 2024
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matherp
Guru

If you want a console and can spare the pins then the 4.3" SSD1963 is the way to go

e.g.

Quick video to upset those trying to use the ILI9488 as a console here

NB: this is in 8-bit parallel 24-bit colour mode rather than 16-bit RG565 which paints the screen 3x faster
Edited 2024-03-16 01:45 by matherp
 
Posted: 08:07pm
15 Mar 2024
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Bleep
Guru

Ok thanks Peter, it looks like I'll have to try to build one of your 1963 parallel USB boards, or find a nice small bare VGA display to use with a VGA USB board.
Regards Kevin.
 
Posted: 08:43pm
15 Mar 2024
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stanleyella
Guru


  Bleep said  Ok thanks Peter, it looks like I'll have to try to build one of your 1963 parallel USB boards, or find a nice small bare VGA display to use with a VGA USB board.
Regards Kevin.

these vga displays are take to bits able but why. the base is standard tripod mount.
small case border

 
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